sunrpc: only free unix grouplist after RCU settles
[ Upstream commit 5085e41f ] While the unix_gid object is rcu-freed, the group_info list that it contains is not. Ensure that we only put the group list reference once we are really freeing the unix_gid object. Reported-by: Zhi Li <yieli@redhat.com> Link: https://bugzilla.redhat.com/show_bug.cgi?id=2183056 Signed-off-by: Jeff Layton <jlayton@kernel.org> Fixes: fd5d2f78 ("SUNRPC: Make server side AUTH_UNIX use lockless lookups") Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
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